The diagnosis of Endometriosis is usually be made when patches of endometrial tissue are seen.
Generally, a doctor inspects the abdominal cavity through a fiber-optic viewing
tube (a laparoscope) inserted into the abdominal cavity through a small Incision just
below the navel. In some cases, endometriosis can't be recognized when viewed, and the
diagnosis can only be made by a biopsy, usually performed during the endoscopy.
Other procedures, such as ultrasound scans, barium enemas with x-ray,
computed tomography (CT), and magnetic resonance imaging (MRI), may be used to determine
the extent of the disease and follow its course, but their usefulness in diagnosis is
limited. Certain blood tests that detect markers for endometriosis, such as CA-125 and
antibodies to endometrial tissue - may also help a doctor follow the course of
endometriosis. However, because these markers may be elevated in several other diseases,
they aren't useful in making the diagnosis.